Lifting-jack



(No Model.

J-. W'. DONOHOE- LI FTING JACK.

Patented Sept. 28, 1886.

witnesses n FETEFIS. Photn-Lilhngnphur, Wuhingtm 01c UNITED STATES PATENT OFFICE.

JOHN W. DONOHOE, OF FRANKFORT, OHIO.

LlFTlNG-JACK.

SPECIFICATION forming part of Letters Patent N 0. 3519.698, dated September 28. 1886. Application filed June 23, 1886. Serial No. 206,016. (No model.)

To all whom it may concern.-

Be it known that I, JOHN W. DoNoHoE, a citizen of the United States, residing at Frankfort, in the county of Ross and State of Ohio, have invented a new and useful Improvement in Lifting-Jacks, of which the following is a specification.

My invention relatesto animprovement in lifting-jacks; and it consists in the peculiar construction and combination of devices that will be more fully set forth hereinafter, and particularly pointed out in the claim.

In the drawings, Figure 1 is a side elevation of my invention. Fig. 2 is a front elevation of the same.

A represents a suitable base or support, from which project verticalstandards B, which are arranged at a slight distance apart. Between the said standards is placed a verticallymovable head, 0, which is provided with flanges D, that bear upon opposite edges of the standards, so as to guide the head thereon. The head is also provided on its upper side with an ascending series of steps or shoulders, E. Between the upper ends of the standards is pivoted a lever, F, which is provided at its inner end with an eccentric head, G. This eccentric or head is connected to the sliding head by means of curved connecting-rods H, which are pivoted at their upper ends to the eccentric head and at their lower ends to the flanges D on the front side of the sliding head. When the lever F is raised to the position shown in dotted lines in Fig. 1, the sliding head 0 is lowered, and one of the shoulders engage with the spindle By lowering the lever F to the E may be caused to of the axle.

position shown in solid lines in Fig. 1, the sliding head 0 is elevated, thereby raising the axle of the vehicle and lifting the wheel above 0 the ground, when it may be readily detached from the axle. As the lever F is moved downwardly the pivotal pin I, which connects the upper ends of the connectingrods H with the eccentric head, is moved rearwardly over the fulcrum of the lever, and the latter is thereby caused to sustain the sliding head in its elevated position, as will be very readily understood.

A lifting-jack thus constructed is cheap and simple, is very strong and durable, and likely to get out of order.

Having thus described my invention, I claim The combination, in a lifting-jack, of the vertical standards B, arranged at a slight distance apart, sliding head 0, fitting between the said standards and having the flanges Dbearing on the front and rear sides thereof, the lever F, pivoted between the upper ends of the standards and having the eccentric head G, and the connecting rods H, having their outer ends pivoted to the eccentric head and their lower ends pivoted to the sliding head 0, for the purpose set forth, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

JOHN W. DON OHOE.

is not Witnesses:

J OHN N. WISEHART, MARTIN OoNLEY. 

